Turning to the question of threats, when you responded, you talked about not being able to imagine threats to the U.S. that aren't also threats to Canada. But I want to turn that on its head. One of my concerns is that I can imagine threats to Canada that the U.S. does not perceive as threats to it, particularly in the Arctic. I've raised this question before.
So my question, focusing a little more narrowly on aerospace functions, is whether those joint agreements apply in a case where we perceive there is a threat to our sovereignty, for instance in the Northwest Passage where the United States differs on our territorial claims.